Feed mechanism.



` 4 SHEETS-SHEET 1.

-IEETENTED JUNE 6, 1905. -W. s. DAVENPORT.

EEED MEGEANISM. APPLICATION FILED NOV. 4| 1901.

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No. 79l,544\ 'PATENTED JUNE 6, 1905.

' PATENTEDJUNE 6, 1905.

W. S. DAVENPORT. FEED MECHANISM. APPLIUATIN FILED Nov. 4. 1901.

No. 791,544.v

SHEETS-SHEET F/aJ. l

/40 TNES .55s,

` 110.791,544. I PATBNTED JUNEB, 1995.y

- W. s. DAVENPORT.

FEED MEGHANISM.

APPLIGATION FILED Nov. 4, 1991.

' 4 SHEETS-SHEET 4.

UNITED STAT-Es y Patented June 6, 1905.

PATENT OFFICE.

WILLIAM S. DAVENPORT, OF NEW BEDFORD, MASSACHUSETTS, ASSICNOR To BROWNAND SHARPE MANUFACTURING COMPANY, OF PROVIDENCE,

RHODE ISLAND, A CORPORATION OF RHODE ISLAND.

FEED MEOHANISM.

SPECIFICATION forming part of Letters Patent N- 791,544, dated June 6,1905. Application filed November 4, 1901. Serial No. 81,114.

To all whom/ it mag/concern.:

Be it known that I, WILLIAM S. DAVENPORT,

residing at VNew Bedford, in the county of lBristol and State ofMassachusetts, have invented certain new and useful Improvements in FeedMechanisms; and I do hereby declare the following specification, takenin connection with the accompanying drawings, forming a part of thesame, tobe a full, clear, and

Io exact description thereof.

The invention relates to that class of machines in which arod ofstock,which is rotated about its axis, is intermittently fed forward;and the object of the invention is to provide I5 a simple and efficientmechanism for feeding Vthe stock in such machines. This is accomplishedby providing feeding-rolls mounted in a rotary head or support whichrotates with the rod of stock and connecting these rolls zo with rotarymembers which also rotate with the rod of stock and may also be rotatedabout their axis by engagement with a nonrotary member with which theymay be engaged and disengaged. `I/Vith this construction the feed-rollsand their connected rotary members rotate with the stock and do or donotalso have a rotation about their axes, according as the rotary membersare or are not engaged with the non-rotary member. The 3o engagementbetween the non-rotary member and the revolving or traveling rotarymembers causes said rotary membersto be rotated von their axes, whichmotion is transmitted to the rolls, causing said rolls to rotate andfeed 3 5 forward the stock, which feeding movement.

described Jhave been shown merely .as pre-- ferred embodiments of theinvention and also for the reason that they embody features of 5oinvention in addition to the broad features of invention.

In further describing the invention I will refer to the accompanyingdrawings, in which mechanism embodying all the features of the inventionin their preferred forms is shown in connection with a spindle and chucksuitable for use in a screw-machine or other machine whereinthe stockbeing operated upon is intermittently lfed through a revolving spindle 6o and chuck.

In the drawings, Figure l is an elevation, partly in section, showing aspindle and attached chuck provided with feeding mechanism embodying thepresent invention. Fig. 2 is a horizontal central section 4through thefeeding mechanism, the chuck being removed and certain parts being Shownin plan. Fig.

'3 is a sectional view on line 3 3 of Fig. 2. Figs.

ated upon by the mechanisms of the machine in which the spindle isincorporated is fed at 8o v suitable invervals. The spindle may berotated in the usual manner through a cone-pul- Vley 5, secured thereto,and is-provided with a screw-thread at its forward end, by which a chuck6 may be secured to the spindle, or the 85 Ychuck may be formed in theend of the spin-A dle and may be of any suitable or well-knownconstruction. The chuck is provided with the usual jaws (not s'hown)'forgrasping'the rod of stock and causing it to rotate with the spindle,vand vthe jaws may be operated to grasp or release the stock through anysuit-` -able or well-known connections, as by a sleeve 7, mounted toslide on the chuck-body, the jaws of the chuck being opened when theu9`5sleeve is moved forward toward the front end of carried in an annulargroove in the sleeve 7.

The rock-shaft 9 is operated through a segment-arm 12, secured thereto,the outer end of which is provided with gear-teeth engaged by a segment13, which is connected with an operating hand-lever 14:. In case thespindle is incorporated in an automatic machine the movements of thesleeve 7 will be effected and controlled by suitable automaticmechanisms, as is usual in such machines. The devices thus far referredto may be of any well-known construction, and their operation is asusualthat is to say, during the operation of the devices for acting uponthe rod of stock the jaws of the chuck are closed to firmly grasp thestock, and when the stock is to be fed forward the jaws of the chuck areopened to allow such action. The rod of stock is 'fed forward at theproper time by the action of feeding-rolls 15, arranged to engage thestock and mounted in a head or support 16, which rotates with the rod ofstock. In the arrangement shown the head or support 16 is mounted uponand secured to the spindle 1 and is arranged within the cone-pulley 5.The feed- 4rollsv thus move with the spindle and rod of stock andrevolve or travel about the aXis of the spindle. The feed-rolls arerotated on their axes to feed forward the stock through rotary membersmounted in the head 16, so that they also revolve or travel about theaxis of the spindle, these rotary members being arranged to be engagedwith a stationary or non-rotary member and to be rotated about theiraxes by such engagement. In the mechanism shown the rotary members arein the form of friction-disks 17 mounted upon studs 18, secured in thehead 16, and vthe non-rotary member with which they engage is in theform of a friction-disk 20, carried by or formed on a Vcollar 21, whichis mounted to slide on the ,A hub of the cone-pulley. The rotary membersand feed-rolls may be connected in any suitable manner, so that therotation of the rotary members is transmitted to the feed-rolls, and asimple and efficient means for thus connecting these devices is thatshown in Figs. 2 and 3. In this construction the feed-rolls are securedto the ends of short shafts 22, upon the opposite ends of which areformed ,spur-gears 23, arranged to engage with pin- Aions 24, secured tothe disks 17 In order that the feed-rolls may yieldingly engage thestock and accommodate themselves to variations in f the size thereof,the shafts 22 are mounted in carriers are provided with weighted arms 26to counterbalance the centrifugal force which would tend to throw thefeed-rolls outward as they revolved about the axis of the spindle. Therolls are held yieldingly in contact with the stock by the action ofsprings 27, which are supported upon the pins 28 on the head and inrecesses 29 in the arms 26. Normally or when the feed is not takingplace the disk 20 is out of engagement with the disks 17, and neitherthe disks 17 nor the feed-rolls are rotated about their axes. When thefeed is to take place, the disk 20 is moved forward into engagement withdisks 17, and as said disks 17 travel about the axis of disk 20 they arerotated and rotate the feed-rolls to feed forward the stock until thedisk 2O is moved back to disengage the disks 17, when the rotation ofthe disks and rolls, and therefore the feed, ceases. The disk 2O may bemoved at the proper time by any suitable mechanism; but it is preferredto operate said disk from the mechanism which operates the jaws of thechuck, the connections being so constructed that the operations of themechanism to open the chuck-jaws moves the disk 2O into engagement withthe disks 17 to start the feed, and the operation of the mechanism toclose the chuck-jaws disengages the disks to stop the feed. A simple andefficient form of such connection between the disk 20 and thechuck-operating mechanism is shown in the drawings. In this constructionthe collar 21, which carries the disk 20, is secured in the rear end ofa casing 30, which surrounds the head or support 16, and is providedwith a ange at its front end mounted to slide on the rear end of thebearing 31. The casing 30 is provided with ears 32, through which rods33 pass, the rods being guided and supported in bearings 34, secured tothe frame of the machine. vA yielding connection between the rods andthe casing is provided by interposing springs 35 between the cars 32 andnuts 36 on the rear ends of the rods, the springs tending to hold theears in engagement with iianges or collars 37, formed on the rods. Therods are pressed rearward by springs 38, which tend to hold the disk 2Oout of engagement with the disks 17. The rods are moved forward at theproper times by the action of pins 39, projecting from ears 40 on thearms 8, which pins are arranged to engage projections 41 on the rods.When the arms are rocked forward to open the chuck-jaws, the pins act todraw the rods forward, thus bringing the disk 20 into engagement withthe disks 17 after which any further forward movement of the rodscompresses springs 35. When the arms 8 are moved in the reversedirection to close the chuck-jaws, the pins allow the springs 38 to movethe rods rearward, the collars engaging the ears 32 and carrying thedisk 2O out of engagement with the disks 17 In Figs. 6 and 7 I haveshown another form IOO of feed mechanism having the same generalfeatures of invention and mode of operation as the construction alreadydescribed, but differing somewhat in specific constructionandarrangement. In this construction the feedingrolls l5 are mounted ina head or support 42, se-

cured to the spindle 1, and said rolls revolve or being secu red in theianges 46 47 of thehead 42. f The carriers are forced yieldingly forwardtoward the spindle by the action of springs 48, mounted in recesses inthe flange 47 and bearing upon pins 49, which project from the car riersthrough slots 50 in the flange 47 These springs act to resist theoutward movement of the carriers, dueto centrifugal force, and also holdthe -rolls yieldingly in engagement With the stock, so that said rollsmay accommodate themselves to variations in the size of the stock. Therotary members for driving the feed-rolls in this construction are inthe form of friction-disks 51, and these disks are connected With therolls l5 by being secured to the shafts 43. The non-rotary or stationarymember with which theseA disks cooperate is in the form of afriction-disk 52, movable into and out of engagement With said disks.

The disk 52 is secured to a collar 53, and this operated in the samemanner as already decollar is secured in the rear end of a casing 30,similar to the casing already described, which casing is connected Withthe chuck-operating mechanism by the same devices and is scribed.

WhatI claim as my invention, and desire to secure by Letters Patent, is-

l. In a feeding mechanism, the combination of a rotary head or support,a feeding-roll carried thereby for engaging the stock, a rotary memberconnected With said roll, a non-rotary gaging and disengaging saidrotary and nonv rotary members.

3. In a feeding mechanism, the combination of a rotaryhead or support,feeding-rolls carried thereby for engaging the stock, rotary 4. In afeeding mechanism, the combination of a rotary head or support,feed-rolls mounted therein and arranged on opposite sides of the aXisthereof, rotary disks mounted in said head and connected With saidrolls, and a sliding non-rotary disk movable into and out of engagementWith said disks.

5. The combination, with a rotary spindle through which the stock isfed, of feed-rolls mounted to move with said spindle, rotary disksmounted to move With said spindle and connected with said rolls, and anon-rotary disk movable into and out of engagement with said disks 6.The combination, with a rotary chuck and means for operating the same tograsp and release the stock, of a rotary head or support rotating withsaid chuck, feed-rolls mounted in said head for engaging the stock,

rotary members mounted in said head and connected with said rolls, and.a non-rotary member connected With said chuck-operating means to bemoved into and out of engage; ment Withsaid rotary members thereby.

' 7. The combination of a rotary head or support, pivoted carriersmounted in said head, y

feed-rolls mounted in said carriers, rotary ldisks mounted in said headand connected with said rolls, a non-rotary disk movable into and outoffengagement With said rotary disks.

8. The combination of a rotary head or support, pivoted carriers mountedin said head, feed-rolls mounted in said carriers, rotary `disks mountedin said head independent of said carriers, gearlng connecting sald disksand rolls, and a non-rotary disk movable into and out of engagement Withsaid disks.

9. rlhe combination, With a rotary spindle, feed-rolls carried thereby,rotary members carried by said spindle and connected with said rolls, alongitudinally-movable casing surrounding said rolls, and rotarymembers, and a non-rotary member carried by said casing.

WILLIAM' S. DAVENPORT.

Witnesses:

FRANK W. CRAIG, CHARLES MITCHELL.

IOO

